Shimano Ultegra BB72, BBR60 Hollowtech II Bottom Brackets New seal construction for smoother rotation. Item Specifications: Weight, 69, BB/Frame Interface, BB86, BB/Frame Interface, BB89.5, BB/Frame Interface, BB92, Spindle Interface Type, Shimano Hollowtech II, BB Shell Width, 86, BB Shell Width, 89.5, BB Shell Width, 92, Defined Color, Black, Bottom Bracket Shell I.D., 41,.
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